Groin Game is a sport often played on buses and trains where two combatants (or Gladiators) face each other sitting down, and attempt to either hold their opponents legs open at at least a 60 degree angle (playing from the inside) or pin their opponents legs together for 3 seconds (playing from the outside). An adjucator is present to preside over the match. There are currently 2 weight divisions, Chodeweight and Banterweight. The sport was invented by Guus van Grunt, a Flemish nobleman, in Groningen, Netherlands in 1782. It is currently most popular in London, England on public transport.